ClipArt ETC
A single celled organism that is one of the building blocks of life.

Amoeba

A single celled organism that is one of the building blocks of life.

An amoeba expanding in size from cellular absorption.

Amoeba

An amoeba expanding in size from cellular absorption.

An amoeba multiplying by way of simple fission

Amoeba

An amoeba multiplying by way of simple fission

multiple amoebas

Amoeba

multiple amoebas

"Lung of Ceratodus, opened in its lower half to show its cellular pouches. a, right half; b, left half; c, cellular pouches; e, vena pulmonalis; f, arterial blood-vessel; oe, esophagus, opened to show glottis." — Encyclopedia Britannica, 1893

Ceratodus Lung

"Lung of Ceratodus, opened in its lower half to show its cellular pouches. a, right half; b, left half;…